26 FRUCTIFICATION, OR FLOWER AND FRUIT. 



in Seeds, which appears to me always either -a pair 

 of subterraneous Cotyledons, or a part of the Em- 

 bryo ; see Trans, of Linn. Soc. v. ix. 204. 



4. Testa, the Skin, either simple, or lined with a 

 finer film, Membrana, contains, and gives a shape 

 to, the foregoing parts, and in vegetation bursts 

 irregularly. A pulpy Seed, Semen baccatum, is 

 furnished with pulp between the Membrana and 

 the outer Skin, as in Jasminum*. 



5. Hilum, the Scar, or point of attachment, at the 

 base of every Seed, where all the internal parts 

 meet, and through which they are nourished 

 while growing. 



Accessory, not essential, parts of a Seed are : 



e. Strophiolum, the Crest, an occasional appendage 

 to the Scar, of a glandular appearance, as in 

 Chelidonium, and some Leguminous genera, Ulex, 

 Spartium, <*c. 



7. Pellicula, the Pellicle, a thin close membrane; 

 a downy covering ; or a glutinous substance, not 

 perceptible till the Seed is moistened, as in Sal- 

 via verbenaca. 



* M. Richard, who unnecessarily, I think, invents the terra Epi- 

 sperm for the Testa of Gaertner, asserts this covering to be always sim- 

 ple, though he allows it to be formed of two membranes, with an in- 

 termediate vascular parenchyma, or pulp. Any person who examines the 

 kernel of an Apple will surely, in every stage of its growth, find a c'ou- 

 ble Testa, the outermost firmly coriaceous, the innermost membranous ; 

 nor are numerous instances,' of the same kind, wanting, where th 

 external Testa can by no means be taken for any thing else. 



